diff --git a/src/Bannerlord.Diplomacy/CampaignBehaviors/WarExhaustionBehavior.cs b/src/Bannerlord.Diplomacy/CampaignBehaviors/WarExhaustionBehavior.cs
index df5914e..8189cba 100644
--- a/src/Bannerlord.Diplomacy/CampaignBehaviors/WarExhaustionBehavior.cs
+++ b/src/Bannerlord.Diplomacy/CampaignBehaviors/WarExhaustionBehavior.cs
@@ -169,7 +169,7 @@ private void OnHeroKilled(Hero victim, Hero killer, KillCharacterAction.KillChar
                     return;
             }
 
-            _warExhaustionManager.AddHeroPerishedWarExhaustion(kingdoms, victim, killer.PartyBelongedTo.Name ?? effector!.Name, detail);
+            _warExhaustionManager.AddHeroPerishedWarExhaustion(kingdoms, victim, killer.PartyBelongedTo?.Name ?? effector!.Name, detail);
         }
 
 
@@ -251,4 +251,4 @@ public override void SyncData(IDataStore dataStore)
             }
         }
     }
-}
\ No newline at end of file
+}